abbott



Y 2 Sheets-Sheet 1.

(No Model.)

w. W. ABBOTT. MITERINGMAGHINE.

Patented Mar. 14,

mils PETERS co. PHOTO-LIT (No Model.) 2 Sheets-Sheet 2.

W. W. ABBOTT.

MITERING MACHINE.

N0.49s,541. I v Patented M a,r.14,1893.

UNITED STATES PATENT OFFICE.

YVILLIAM W. ABBOTT, OF NEW HAVEN, CONNECTICUT, ASSIGNOR TO ELBRIDGE F.BARNES, OF SAME PLACE.

MlTERlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 493,541, dated March14, 1893.

Application filed November 14, 1892. Serial No. 451,913. (No model.)

To all whom it may concern.-

Be it known that I, WILLIAM W. ABBOTT, of New Haven, in the county ofNew Haven and State of Connecticut, have invented a new Improvement inMitering-Machines; and I do hereby declare the following, when taken inconnection with accompanying drawings and the letters of referencemarked thereon, to be afull, clear, and exact description of the same,and which said drawings constitute part of this specification, andrepresent, in

Figure l, a plan view of a mitering machine constructed inaccordance'with-my invention, the guard or fender of one of the sawsbeing removed; Fig. 2, a view of the machine partly in side elevationand partly in vertical section on the line m-w of Fig. 1; Fig. 3, asimilar view on the line yy of Fig. 4; Fig. 4, a plan view of the baseof the machine.

My invention relates to an improvementin mitering machines, the objectbeing to produce a simple, convenient and effective machine, having alarge capacity for accurate work, capable of being readily adjusted forsquare as well as for a variety of miter cuts, and reducing the handlingof the molding or material operated upon to the minimum, the saws beingmoved upon the work instead of the work being moved upon the saws.

WVith these ends in view,my invention consists in a mitering machinehaving certain details of construction and combinations of parts as willbe hereinafter described and pointed out in the claims.

As herein shown, the table A, of my improved machine is supported uponfour legs B, and constructed with two large corresponding openings C C,in which the upper ends of the respective saw-frames D D, swing, with atriangular opening E, located centrally in front of the openings beforementioned, and with two narrow, corresponding saw-ways F and F, locatedat a right angle to each other, and respectively leading from theadjaoent forward corners of the openings C and C into the inner end ofthe triangular opening E. The said table is provided upon its upper facewith two corresponding guides G G, swung on pivots g g, passing throughtheir inner ends, which are located in line with the intersection of thetwo saw-ways FandF before mentioned. Each of these guides is pro videdwith a curved arm G,havinga segmental slot G which receives a hand-screwH,

which may be shifted to the different holes of a series of holes it,formed in the table, according to the character of the miter which it isdesigned to cut. The arm G, of one of the guides is broken away, inorder to show these holes, of which there are two sets, one for eachguide.

The saw-frames D and D, before mentioned, are arranged at a right angleto each other beneath the said table, and pivotally supported at theirlower ends in a base 1, best shown by Fig. 4 of the drawings. Thusarranged, the upper ends of the saw-frames when the same are swung, movein paths at right angles to each other. These frames, as shown, are castin what may be called skeleton-form, and gradually widen from theirupper to their lower ends. Each frame is provided with a circular saw J,projecting above the table A, and mounted upon the outer end of a shorthorizontal driven-shaft K, having bearing in the extreme upper end ofthe frame, which is virtually bifurcated to receive a pulley K, mountedupon the said shaft, and driven by a belt K also running over a pulley Kmounted on a driving-shaft L, which is supported at its ends in bearingsM M, attached to the base 1, before mentioned, the bearing M, and thepulley K being located within the two arms at 61 formed at the lower endof the frame, which by preference should swing on a point concentricwith the shaft L. In order, however, to relieve the said shaft of theweight and wearing action of the frame, the arm D, thereof is providedwith a horizontal bore N, larger in diameter than the diameter of thesaid shaft, and with a projecting horizontal hub N, through which thesaid bore extends, and which takes into a circular recess 0, formed inone face of a bearing 0, which is secured to the base I, and locatedabout centrally under the table A, this bearing being provided with ahorizontal bore 0 corresponding in diameter to the bore N, beforementioned, and receiving the shaft L. It will be seen from thisconstruction, that the weight and wear of the saw-frame D, so far as thesame is borne by the arm 0?, thereof, falls upon the hub N and therecess 0, in which the same turns, instead of upon the shaft L, whichturns freely in the said bearing 0 and arm D. The outer arm (1 of theframe, is pivoted in a light bearing P, also attached to the base I. Thedriving-shaft L, is provided at its outer end with a driving-pulley L,to which power is communicated from any convenient source.

The foregoing description which has had particular reference to the sawframe D, shown by Figs. 2 and 3 of the drawings, applies equally well tothe saw-frame D, which is like it in all respects except that it ispivoted at a point a little lower down than the frame D, which becomesnecessary in order to provide for the clearance of its drivingshat't Q,from the driving-shaft L, the hub formed at the lower end of this frame,but not shown, taking into a recess R, corresponding to the recess 0,shown in Figs. 3 and a of the drawings, and located in another face ofthe bearing 0', at a right angle to the recess 0, and in a plane belowthe plane thereof. Inasmuch as the two frames are hung in the same wayexcept as specified,- a detailed description of the frame D is thoughtunnecessary.

Each of the frames is provided at itsupper end with a fender S, curvedto conform to the upper ends with knobs S, by means of which the framesare swung, and the saws thus ad vanced to do their work. Chains T Tfastened to the saw-frames, and the table A, are provided for limitingthe forward movement of the frames, whereby the saws are prevented fromfalling forward far enough to be dulled upon the outer wall of theclearance space E, in the table.

In using my improved mitering machine, the work is moved upon the table,pressed against the inner faces of the guides G G, and cut by pullingone saw or the other up against it, then after one out has been madewith one saw, the work is moved along and out by the other saw withoutbeing reversed end for end, that being unnecessary, inasmuch as the sawsoperate at a right angle to each other. Time is thus saved, and thehandling of the work, which is often clumsy, avoided, for in ordinarymitering machines having only one saw, the work must be reversed end forend, in order to have the cuts come right. It will be observed too, thatinstead of advancing the work against the saws, I advance the sawsagainst the work. Herein, also, I secure an important advantage, for insawing long strips of molding, which come often in twelve foot lengths,it is very awkward to move the whole strip, but when the saws are movedinstead of the work, long strips may be out as conveniently as shortones. By shifting the guides in position, I am enabled to make all ofthe different miter cuts that are required, and I may even turn themaround so that they will stand at right angles to the respective saws,and thus present the work for being out at a right angle or square.

I would have it understood that in carrying out my invention I may makesome departures from the construction herein shown and described, andmight even, for instance, d1spense with one of the saw-frames, and useonly one saw, but by preference I shall employ two saws. I wouldtherefore have it understood that I do not limit myself to the exactconstruction herein shown and described,

.but hold myself at liberty to make such changes and alterations asfairly fall within the spirit and scope of my invention.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In a mitering machine, the combination with a table, of twosaw-frames pivotally supported below the same at their lower ends, at

, a right angle to each other, two saws respectively mounted in theupper ends of the said frames, projecting above the table, and also iarranged at a right angle to each other, means for driving the saws, andguides located upon the table for holding the work, substantially asdescribed, and whereby either of the saws may be advanced to the work byswinging 1 the frames. curvature of the saws, and provided near their a2. In a mitering machine, the combination j with a table, of twosaw-frames pivotally snpported below the same at their lower ends, at

a right angle to each other, two saws respectively mounted in the upperends of the said frames, projecting above the frames, and also 1arranged at a right angle to each other, two idriving-shafts arranged ata right angle to each other, and respectively concentric with thecenters on which the frames are swung, connections between the saidshafts and the saws, and guides located upon the table for holding thework, substantially as described.

3. In a mitering machine, the combination with the table thereof, of thetwo saw-frames pivotally supported at their lower ends below i the saidtable, at a right angle to each other,-

two saws respectively mounted in the upper ends of the said frames andprojecting above the said table, two driving-shafts arrangedconcentrically with the centers on which the said frames swing, and oneextending under the other at a right angle thereto, and connectionsbetween the said shafts and the saws, substantially as described.

4. In a mitering machine, the combination with a table constructed withtwo large openings, with a clearance opening located centrally in frontof the same, and with two sawways located at a right angle to eachother,

and leading out of the adjacent forward corners of the said largeopenings into the said clearance opening; of two saw-frames pivotallysupported at their lower ends below the said table at a right angle toeach other, two.

saws respectively mounted in the upper ends of the said frames andprojecting above the I with a table, of two saw-frames located below thesame, and pivotally supported at their lower ends at a right angle toeach other, two saws respectively mounted in the upper ends of the saidframes and projecting above the table, power connections for driving thesaid saws which are located at a right angle to each other, and twoguards or fenders respectively attached to the upper ends of the framesand extending up and over the same, and each adapted to be grasped forswinging the frames and hence the saws, substantially as described.

6. In a mitering machine, the combination with a table, of twosaw-frames located below the same, and pivotally supported at theirlower ends at a right angle to each other, two saws mounted in the upperends of the respective frames, and projecting above the table, powerconnections for the said saws which are also arranged at a right angleto each other, guards or fenders for the saws, and two guides pivoted tothe said table and movable thereon to present the work at differentangles to the saws which are moved up to it by swinging the frames,substantially as described.

7. In a mitering machine, the combination with the table thereof, of twosaw-frames located below the said table, arranged at a right angle toeach other and each provided at its lower ends with a hub having aconcentric bore, two saws respectively mounted in the upper ends of thesaid frames, and projecting above the table, a bearing located below thetable and constructed with two bores arranged one above the other, andat a right angle to each other, and with two recesses respectivelyconcentric with the said bores, two driving-shafts extending through thebores of the said bearing and through the said hubs which take into therecesses of the bearing and support the frames independent of the saiddriving-shafts which are thus made concentric with the centers on whichthe frames swing, and connections between the said shafts and saws,substantially as described.

8. In a mitering machine, the combination with the table thereof, of oneor more sawframes pivotally supported below the same at its lower end,each frame havingasaw mounted in its upper end to project above thetable,

- a driving-shaft arranged concentric with the centers on which it isswung, but relieved of its weight, connection between the said shaft andsaw, whereby the latter is driven, and a guard attached to the upper endof the frame, and curving upward over the saw, and adapted to be graspedby the hand for swinging the frame, substantially as described.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

WM. W. ABBOTT.

Witn esses:

GEO. D. SEYMOUR, FRED. O. EARLE.

